我在Windows 7上设置了Python（3.6.5）记录器，以同时写入文件和标准输出：
def __filehandler() -> logging.FileHandler:
filehandler = logging.FileHandler(LOGFILE, encoding="cp932")
filehandler.setLevel(logging.DEBUG)
fformatter = logging.Formatter("%(asctime)s: %(name)-13s: %(levelname)-8s: %(message)s")
filehandler.setFormatter(fformatter)
return filehandler
def __streamhandler() -> logging.StreamHandler:
streamhandler = logging.StreamHandler()
streamhandler.setLevel(logging.DEBUG)
sformatter = logging.Formatter("%(name)-13s: %(levelname)-8s: %(message)s")
streamhandler.setFormatter(sformatter)
return streamhandler
def getlogger(calling_module_name: str) -> logging.Logger:
logger = logging.getLogger(calling_module_name)
logger.setLevel(logging.DEBUG)
logger.addHandler(__filehandler())
logger.addHandler(__streamhandler())
return logger
然后使用它调用logger.info(some_text)
标准输出看起来像预期的：
mymodule: INFO : Reading file #1/2, line #42/164: /****************************************************************************/
mymodule: INFO : Writing file #1/2, line #42/164: /****************************************************************************/
mymodule: INFO : Reading file #1/2, line #43/164:
mymodule: INFO : Writing file #1/2, line #43/164:
mymodule: INFO : Reading file #1/2, line #44/164:
mymodule: INFO : Writing file #1/2, line #44/164:
但是在相应的文件中，还有其他内容，但不包含换行符：
2019-05-17 12:21:11,824: mymodule: INFO : Reading file #1/2, line #42/164: /****************************************************************************/
2019-05-17 12:21:11,824: mymodule: INFO : Writing file #1/2, line #42/164: /****************************************************************************/
2019-05-17 12:21:11,824: mymodule: INFO : Reading file #1/2, line #43/164:
2019-05-17 12:21:11,824: mymodule: INFO : Writing file #1/2, line #43/164:
2019-05-17 12:21:11,824: mymodule: INFO : Reading file #1/2, line #44/164:
2019-05-17 12:21:11,839: mymodule: INFO : Writing file #1/2, line #44/164:
将filehandler = logging.FileHandler(LOGFILE, encoding="cp932")更改为filehandler = logging.FileHandler(LOGFILE)无效。
添加的换行符不利于日志的清晰度，并不必要地夸大了日志的大小。任何想法在这里发生了什么？